Volume much softer on Jack than on ALSA/PulseAudio?

Alyssa Vance <[email protected]> Mon, 15 Jul 2019 17:28:24 -0700

Newsgroups	gmane.comp.audio.jackit
Message-ID	<CAGTMxpJhee=O-w0M3jqLAJg7HxoBosLgMNjsMXsaxuRLm9xFog@mail.gmail.com>

I'm running an ALSA -> PulseAudio -> Jack bridge setup on an Ubuntu 18.04
x86 laptop. Sound played via ALSA directly seems to be much louder than via
Jack, eg.:

gst-launch-1.0 audiotestsrc freq=200 volume=1.0 ! alsasink

is much louder than

gst-launch-1.0 audiotestsrc freq=200 volume=1.0 ! jackaudiosink

I've looked at every volume knob I can find (via alsamixer, qasmixer, pactl
list, etc.), and they're all at 100%. Does the PulseAudio -> Jack bridge
have a volume parameter hidden in a config file, or something like that?
Thanks.

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